Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-11-01
2005-11-01
Dudek, James A. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S118000
Reexamination Certificate
active
06961106
ABSTRACT:
The present invention provides an inexpensive retardation optical element having the function of reflecting ultraviolet light, capable of decreasing the amount of ultraviolet light that enters a liquid crystal cell, and a liquid crystal display comprising such a retardation optical element. A retardation optical element having the function of reflecting ultraviolet light10comprises a retardation layer12having a cholesteric liquid crystalline molecular structure in planar orientation. The retardation layer12is made so that at least part of its selective reflection wave range for light, which the retardation layer12selectively reflects, due to its liquid crystalline molecular structure, is included in an ultraviolet region of 100 to 400 nm and that the maximum reflectance for light in this ultraviolet region is 30% or more.
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patent: 11-293252 (1999-10-01), None
Dai Nippon Printing Co. Ltd.
Dudek James A.
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